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The Journal of Sports Medicine and Physical Fitness 1999 June;39(2):133-9

Copyright © 1999 EDIZIONI MINERVA MEDICA

language: English

Muscle enzyme release does not predict muscle function impairment after triathlon

Margaritis I., Tessier F., Verdera F., Bermon S., Marconnet P.

Laboratoire de Physiologie de l’Activité Musculaire, Faculté des Sciences du Sport, Université de Nice Sophia-Antipolis, Nice, France


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Background. We ­sought to deter­mine the ­effects of a ­long dis­tance tri­ath­lon (4 km ­swim, 120 km ­bike-­ride, and 30 km run) on the ­four-day kinet­ics of the bio­chem­i­cal mark­ers of mus­cle dam­age, and wheth­er ­they ­were quan­ti­ta­tive­ly ­linked ­with mus­cle func­tion impair­ment and sore­ness.
Methods. Experimental ­design: Data ­were col­lect­ed ­from 2 ­days ­before ­until 4 ­days ­after the com­ple­tion of the ­race. Participants: Twelve tri­ath­letes per­formed the tri­ath­lon and ­five did not. Measures: Maximal vol­un­tary con­trac­tion (MVC), mus­cle sore­ness (­DOMS) and ­total ser­um CK, CK-MB, LDH, AST and ALT activ­ities ­were ­assessed.
Results. Significant chang­es ­after tri­ath­lon com­ple­tion ­were ­found for all mus­cle dam­age indi­rect mark­ers ­over ­time (p<0.0001). MVC of the ­knee exten­sor and flex­or mus­cles ­decreased ­over ­time (p<0.05). There is dis­par­ity in the ­time ­point at ­which ­peak val­ues ­where ­reached for ­DOMS, MVC and ­enzyme leak­age. There is no cor­re­la­tion ­between ser­um ­enzyme leak­age, ­DOMS and MVC impair­ment ­which ­occur ­after tri­ath­lon.
Conclusions. Long dis­tance tri­ath­lon ­race ­caused mus­cle dam­age, but ­extent, as ­well as mus­cle recov­ery can­not be eval­u­at­ed by the mag­ni­tude of chang­es in ser­um ­enzyme activ­ities. Muscle ­enzyme ­release can­not be ­used to pre­dict the mag­ni­tude of the mus­cle func­tion impair­ment ­caused by mus­cle dam­age.

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